Oeiras weather in May (Lisbon Region, Portugal)

How's the weather trend in Oeiras as May approaches? Find all the essential weather information for this month in our guide.

Temperatures

You’ll find the weather in Oeiras during May to be perfect, with pleasant temperatures and moderate rainfall. Daytime temperatures generally settle around 20°C, while nighttime can see a dip to about 15°C.

Precipitation

Oeiras in May usually receives moderate rainfall, averaging around 44 mm for the month. Past climate data indicates that roughly 8 days will see rain.

Average sunshine

With approximately 316 hours hours of sun, the days are filled with brightness. It makes it a perfect month for outdoor activities.

If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit. May, June, July, August, September and October generally stand out with the best circumstances. While January, February, March and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Oeiras climate page with graphs.

 

Oeiras, monthly averages in May

Min Temperature 15°C  

Max Temperature 20°C  

Chance of Rain 28%  

Precipitation 44 mm  

Rainy days 8 days  

Humidity 74% *  

Sunshine 316 hours *  

Percentage Sunshine 71% *  

Data from: Cascais, Portugal (9 KM, 5 Miles).

Where to go in Portugal in May

Find out more about the weather in Portugal and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Oeiras, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

10/10

Walking

10/10

Camping

10/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Oeiras.

Our site offers climate and forecast data for every country in the world. Are you going to Portugal? On this website you can find historical weather averages for many cities in Portugal. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.